The Scantic curls through Hampden past Laughing Brook, and in July the valley floor is loud with running water and insects. Dean Enterprises keeps the town's lawns going through that green stretch — mowing, trimming, bed edging, mulch, and the cleanups that open April and close November. Yards up here run to slope and shade, which makes an even cut a matter of skill rather than horsepower. Getting a hillside lawn to read as level is a quiet kind of showing off. Hampden gets it weekly, all season.